Nut-fastening installation



F. S. CARR April 29, 1930.

Filed Jan. 20, 1927 Invenio:

MA1 'yfs lig- Fred 6. Car?" Awww au, Al e/ Patented Apr. 29, 1930 UNITED" STATES lal'rzN'rl OFFICE FRED S. CARR, OF NEWTON, MASSACHUSETTS, lASSIGNOR, BY MESNE ASSIGNMENTS, T0

UNITED-CARR FASTENER GORPORATION, OF CAMBRIDGE, MASSACHUSETTS, A COR- POBATION'OF MASSACHUSETTS NUT-FASTENIN G 'INSTALLATION Application led January 20, 1927. Serial `No.16.',279.

This invention) aims to provide an improved nut fastening installation.

In the drawings, which illustrate a preferred embodiment of my invention Figure 1 is a front elevation of a portion of a support with a nut part attached thereto;

Fig. 2 is a rear view of the parts shown in Fig. 1;

Fig. 3' includes a section on the line 3-3 of Fig. 1, and also an elevation of a screw and cross-section of a part'to be attached by the screw before the parts are secured together;

Fig. 4 is a section showing the parts shown in Fig. 3 after they have been secured together; and

Fig. 5' is a section of the installation show'- inglthe fastener parts Iin elevation.

eferring to the drawings, I have illustrated nut and screw fastening means in connection with securing two pieces of sheet metal together, but it should be understood that the same fastening means may be used particularly, though not exclusively, for-securing hinges, locks and other parts to the metal body or other portions of a vehicle.

The metal parts shown in the drawings may be termed the body portion or support 1 and a part 2 to be secured to ,the support. In this instance, I have rovided the-support 1 with a depressed portlon 3 having a notched aperture 4 formed in the bottom thereof, and providing a recess 5 for purposes more fully hereinafter described. The part 2 is merely provided with a plain aperture 2a therethrough, as shown in Figs. 3 and 4.

The fastener parts include a screw 6, which in this instance is preferably tapered, and a nut 7. The `nut 7 may be formed in any suitable manner, but I prefer .to press it from sheet metal to provide a base 8 having an aperture 9 therethrough, inwardly folded portions 10 being bent toward each other from the periphery of the base. A central tubular split portion 11 extends outwardly from the inwardly folded portions and is internally threaded to receive the screw 6. At the sides of the tubular portion, I provide paralll "wing portions 11a having interlocl'ring ge erally tapered projections 12 pressed therefrom.

In assembling the nut 7 with the support, the tubular portion 11 and wing portions 11a are entered through the notched aperture 4, from the rear face of the support, so that the base 8 may contact with the depressed portion and prevent the nut from passin entirel through the aperture 4, as shown in Fig. 3. t should be noticed that the tubular portion Y1,1 and wing portions 11a project into the recess 5, but not beyond the outer face of the supy, port 1. When placing the nut in the aperture 4, the projections 12 -contact with the walls of the notches 13 lso that considerable pressure must be exerted to squeeze the wing portions together and permit the projections to snap through the notched portions 13 of the aperture 4. As the edges of the projections 12 which face the base 8 are abrupt, they will contact with the outer surface of the depressed portion 3 and prevent the nut from being accidentally disassembled from the support. The space between the inwardly bent portions 10 and the projections 12 is preferably great enough to accommodate the nut to varying thicknesses of the support to which the nut may be secured.

yIn securing the part 2 in place, the tapered screw 6 is entered in the aperture 2*1 and threaded into engagement with the threads of the split tubular portion 11, as shown in Fig. 4. Thus the part 2 is clamped tightly against the outer surface of the support'l and thel tubular portion 11 is expanded to tightly draw the inwardly folded portion 10, which for all practical purposes may be termed as part of thefbase, against the inner face of the support. In expanding the tubular portion 11, it is forced tightly against the wall of the aperture (Fig. 4) and at the same time sets up a resistance againstthe screw, to such an extent that the threads of the screw are gripped tightly by the threads of the tubular portion and the screw cannot rattle loose when the assembly is subjected to constant vibration.

The projections 12 also provide means for preventing the screw from moving the nut out of its proper relationship with its supuit' ' port 1 when the screw is being threaded into en a ment with the threads of the nut.

ile I have shown and described a preferred embodiment of my invention, it should be understood that chan es involvmg omission, substitution, alteration and reversal of parts and even changes in the mode of operation may be made Without departing from the scope of my invention. A

Claims: 1. A fastener installation comprising, in combination, a support having an aperture formed therein, a nut having a base portion seated against one face of the support and an internally threaded portion extending 4from said base portion through-said aperture, said 4. A screw threaded nut pressed from sheet metal and provided \with a base, inwardly bent portions having their inner ends formed to provide a tubular threaded resilient portion, Wing means located at the sides'of said tubular portion for holding said nut against rotation when secured to a support and laterally projecting means provided integral with said .wing means for cooperatin with said base to hold the nut in assembly w1th the nut-carrying support.

internally threaded portion having a wing' portion'also passing through the support, said Wing portion cooperatingl with a portion of the support to prevent turning of the nut relative to the support and a lateral projec tion extending from one of said portions and engaging the other face of the support, said base portion and said lateral projection theref support from that side/which the base portion engages thereby retaining the nut with the support before the resilient portion is expanded, and means for engagement with said nut to expand said 'resilient portion to lock' said nut in ,engagement with said support.

3. A fastening installation comprising,\in combination, a support havin a depression formed therein, the depresse portion having an, aperture formed therein, a pressed metalNone-piece nut havin apsc'rew receiving contractible and expansi le portion passed through said aperture from the rear face of said support, said Jdepressed portion provid-y ingha recess into which said screw receiving portion projects' without projecting beyond the outer surface of said support, wing portions extending from the sides of the screw receiving portlor for interlocking. engagement with said support against relative-rotation, and projectlng portions presented by said' screw-receiving portion and snapped through said-aperture for preventing a screw from accidentally forcing the nut out of engagement with the support when securing a part against the outer face of the support.

In testimony whereof, I have signed my name 'to this specication. J

' FRED S. CAl-IR. 

